Valve-motion for engines.



V'PATENTED MAY 7, 1907.

T. WILSON. VALVE MOTION FOR ENGINES.

APPLICATION FILED VJULYZZ, 1905.

. UNITED STATES PATENT orrion.

THOMAS WM or HULL, ENG LAND.

V LVE-mono: For; [ENGINES- Patented May 7, 1907.

Application filed July 22, 1905. Serial No. 270,816.

To all whomat may concern: a

Be it known that I, -THOMAS WILsON, a subjectlof the King of England, residing at 375 Hawthorn avenue, Dairy Coates, Hull, in

spindlefod between two sets of motions commy sai'd invention may be better understood. .1 will now'proceed to describe the same with -3 5 reference to the drawing accompanying this valve n is s hown taking steam-in the center and the exhausts are taking place at the' bined, which may be linked up and reversed either separately or in combination. By this arrangement as the valve or'valves are linked up to 'a shorter travel or earlier cut off of the live steam or.1other motive fluid used a wider opening of the admittance ports may be maintained and the exhausts may be also retained to a later period of the piston-stroke than is now the practice by the usual valve or link motions.

My said improvements consist essentially in a supplementary valve motion added to any of the already well-known link motions such as Joy, Stephenson, Gooch'and other similar valve motions. And in order that specification in which:-,

'Fi e 1 shows my improvements applied to an engilne fitted with Joys link motion;

Fig. 2 shows my improvements fitted in a slightl modifiedform to the same link inotion; I ig. 3 shows my improvements'fitted to Stephensons link motion; Fig. 4 shows my improvements fitted to Goochs link motion. Figs. 5 and 6 are details hereinafter referred to.

I In the figures, which are partly diagrammatic for the sake of clearness, the same letters and numerals of reference are employed to denote the same parts in all the views; the parts most closely connected with my invention being shown in heavy lines.

Referring first to Fig. 1, in this figure the outer edges thereof. The valve is shown wlth the mam or ordinary reversmg arm 11 in the out of gear position. 0 and d are steam ports. The valve 0. controls these steam ports 0 and d and'the exhaust ports e and g is the spindle of theslide valve a. Any

- suitable uide may be'fixed at h to carry the weight 0 the combined motions if found de- "sirable. 'i represents a double ended lever or its equivalent, such as an eccentric placed between the ordinary and auxiliary motions,

- the ends of this lever i may be made of suitable proportions to suit each of the motions accordingxto the design of the engine. 3' rep resents t e auxiliary slide valve rod which may be straight or with a distance piece at the end as shown in Fig. 5. it represents the auxiliary lifting link. is the auxiliary radius link which in this instance is shown as a double bar link with pinions added in the center at each side of the link, let into each side or lugs of the bracket m, which bracket. carries the double bar link, the center pinions of which are let therein at either side thereof or the bracket may have pinions which mm be let into the double bar link at the center.

n represents the motion support plate of a locomotive, to which the bracket m may be made secure or in marine or stationary engines it may be secured to the bed plate or any other suitable part of the engine. 0 represents the auxiliary motion eccentric rod, one end of which is made fast to the auxiliary sheave p by a strap while the other end is madefast to the end pinion either at the top or bottom of the double bar link I, which, in this instance is shown attached at the bottom pinions. Any' other suitable link or connection may be used which is equivalent thereto, such for instance as the double radius link q shown at Fig. 4. 12 shows the .auxiliaryinotion sheave set and made fast on the crank shaft at about a-right angle to the crank pin 1". It may be set either to lead or follow the crank pin r, as required.

full. gear While the broken lines show where it and other parts ofthe auxiliary motion .9 represents. the aux liary motion reversmg arm m" would he in the opposite full gear. it shows the ordinary valve rod one end of which is connected to the double ended lever "Z and the other end tothe valve connecting levers u. This valve connecting lever u is the ordinary 'valve connecting lever. 12 shows the ord nary fulcrum rod and w the ordinary radial rod, one end of which maybe made fast to the auxiliary weigh bar as shown. :10 shows the ordinary connecting rod. y represents I to the ordinary connection between the connecting rod and the crank pin 1': 2 shows the crank shaft.

crosshead. .2 are slipper blocks. 3 the ordinarf slipper or guidev of the slipper blocks 2.

b, as before stated, represents reversing armof the ordinary motion inout of gear posi-.

tion. This is reversed'in the opposite direction to that assumedin Fig. 2 on account of the slide valve rod t being. coupled to the double ended lever ibelow instead of above the rod g' and slipper block 2 of the valve con nary and auxiliary motions at the'distances nectin levers u. Inthis particular instance it won d'be desirable to always keeptheordiapart shown, one of them 'being in out of gear position while .the other is.in either of the other full gear positions. To accomplish this I use or combine any two sets of ordinary reversing wheel and screw gearing for combined motion, the ordinary motion may remain as is usual except that it would have a cog or bevel wheel secured at each'end of the-revolving screw barrel of two diameters,

while for the auxiliary motion there may be used a similar set and as it is desirable to ret we'rse'them both by one reversing Wheel :in

this instance, I place the auxiliary motion ree volving barrel with thread for threaded screw bevel wheel on the screw barrel 0 the ordinary screwreversing gear and may be slid in and out of'it as re uired, while at the other end there would'be t ree smaller cog or bevel wheels,'one onthe sliding sleeve feathered on to the threaded barrel of the auxiliary re-' versing screwjthe cogs of which may be slid in and out of the cogs of a second similar smaller sized cog or bevel wheel as required,

jwhich second wheel is always in communication with the smaller cog wheel or bevel gearing at this end 'of the screw barrel of, the ordinary screw reversing gear and the whole may be so arranged side by side that when the sleeve on the auxiliary screw barrel is mid position they are locked and held secure in this position being in communication with V carryi'n wheels i each other. When either of the gears is brought to the center position it can go nofarther inthe same direction until the sleeve the cog or .bevel gearing movable as first beenchanged .as the other gear would then be 'infull-travel. I With the-'I'necha'nism shownntfFigs; 2 3

and- 4, the auxiliary reversing earmayin all" cases, after 'bein reversed, j e-irun in full travel or if desire may be graded-along with the ordinary reversing gear as before described, or bothmotions may be graded and 1 represents the conne ctionbe-. tween the connecting rod and the PlStOIl rod bent, inclined or reversed singly hy any of the well-known re- Referring again to Fig.2, this shows the v 'ordinar Joy valve motion Withthe'auxililary va ve mot on attached thereto and the arrangement is similar to that shown at Fig.

1 with-the exception that the slide valve rod e double ended lever'i above tiscoupled to t instead of below the valve rod 9 and slipper block 2 of the valve connecting levers u. The piston in this'instance, would be at the commencement of the stroke instead of at half stroke as in Fig. 1 the valve "a would also be arranged to admit steam at the outer edges instead of at the center as in Fig. 1.

Referringnow to Fig.3 this shows the ordinary' Stephenson ,motion having auxiliary as in Fi s; 1 and valve motion added thereto 2. In this case the iston is at t e" commen'cement of the stro e as in Fig. 2 and the valve a arranged to admit steam at the fi ure, 4 shows a guide 1 d by a swinging link outer, edges.- 11 this which may be replace carrying the die bolt 50f the ordinary slide valve-rod -t which "may be either straight,

radius link, and 7 is the ordinary lifting link,

while 5 is the ordinary die bolt connection to the ordinary radius link 6. y

"At 5 is shown in cross section the auxiliar y slide valve rod j, broken lines show where astrengthening rod may be attached if neces sary whenthe double ended lever is'straight,

butthe double ended le'verirnay be inclined or'bent, in which case 3' may be a straight rod- 1 Referring to Fig. 6, this shows ,a section drawn to an enlarged scale of solid joint at jointed, die the ordinary the'double bar link end of the auxiliary slide valve rod 7'. scoped 'or screwed into a guide 9,-on the double bar link [and connected to the auxiliary slide valve rod 7' before being made secure in the double bar link I. This joint may beiused for any ordinary double bar: gears. 10 is a motion bar or bars. The guide 8may It consists of a Hide 8 tele" be bored out hollow as also maythe center pinions of the double bar'link fl o'r its bracket m, so that in the eventgfof anything" going wrong with the auxiliary motion sheave o t. carried on the engine for this purpos can be the auxiliary eccentric rod 0 anYextra inserted.

Referring to' .Fig=' 4;,- this shows the-iordinary Gooch link motion withjrnvf auxiliary valve motionfitted thereto whereythere' is [only room for four eccentrics between the cranks, -.or. for'other classes off enginesjthis-figure, the parts are shown with-steam being;ladm itted from the center as in Fig. 1 and exhausting at fthefendof the piston valve 11, ordinary fiatvalves being." referablyjemp y' h --'pi to n is at i t e commence-.

ment of its stroke. as in'Figs. 2"and In this figure, 1 1 is the foreway sheave and 12 is the backway sheave; {I3 is the auxiliary iliary eccentric engmes designe the reversing arm I).

The auxiliaryslide valve rod 1 and the auxd to run in one direction only or in non-reversible engines. In this instance Imay find it convenient to dispense with the auxiliary double .bar radius link '1, the bracket m, auxiliary reverse gear a and the auxiliary lifting link 7c.

ters Patent of the United States of America 1, In a valve motion, the combination of a valve and its stem, an operating'dever pivoted to said stem, amain link motion pivoted to said lever, an auxiliary link motion connected to the other end of said lever; and means for reversing said motions separately, substantially as described.

2. In\ a valve'motion, the combination of ,a valve-and 1ts stem, an operating lever connected to said stem,

a main oted to one end of said lever, an auxil ary linkmotion rodo may form one rod in What-I- claim and desire to secureby Let-- 'tion, including an eccentric,

link motion piv- I I pivoted to the other end of said lever, includin an eccentric, a rod operated by said eccentric, a link operated by said rod, and connections between said link and one end of saidlever, and means for reversing said motions separately, substantially as described. v j 3. In a valve motion, the combination of the valve and its stem, a lever pivotally connected to said stem, a main link motion there for, includinga connecting rod,"one end of which is pivoted to main connecting rod and connections between said last named rod and said first namedconnecting rod, an auxiliary link moa rod operated by'said eccentric, a link operated by said rod and connections between said link and said lever, and means for reversing each of said link motions separately, substantially as described.

In testimony whqreof, I affix my signature, in presence of two itnesses:

, THOMAS WILSON Witnesses;

Dixon, v

A. Bianonor'r.

one end of said lever, a 

